50 lines
2.5 KiB
Python
50 lines
2.5 KiB
Python
from sqlalchemy import *
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from sqlalchemy.dialects.mysql import TINYINT
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from sqlalchemy.orm import declarative_base,sessionmaker
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from datetime import datetime
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from core.database import Base, engine
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# 为了符合三范式，就业表只保存 student_id，不保存学生姓名和班级名称。查询返回时通过关联 students 和 classes 带出学生姓名、班级名称。
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class Employment(Base):
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__tablename__ = "employments" # 实际数据库的表名字
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id = Column(BigInteger, primary_key=True # 主键
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, autoincrement=True # 声明是自增主键
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,comment="就业信息主键id")
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student_id = Column(Integer, ForeignKey("students.id") # 外键 -> students.id
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, nullable=False # 不允许为null
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, unique=True # 每个学生只对应一条就业信息
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,comment="关联学生id")
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employment_status = Column(String(30)
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, default="not_started"
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, nullable=False
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,comment="就业状态:not_started/job_hunting/offered/employed")
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employment_open_date = Column(Date
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,comment="就业开放时间")
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offer_date = Column(Date
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,comment="offer下发时间")
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company_name = Column(String(100)
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, comment="就业公司名称")
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salary = Column(DECIMAL(10, 2) # 定点小数薪资，最多10位数字，小数占2位
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, comment="就业薪资")
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remark = Column(String(255)
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,default=None
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, comment="备注信息")
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created_at = Column(DateTime
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, default=datetime.now
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, server_default=text("CURRENT_TIMESTAMP")
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, nullable=False
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, comment="创建时间")
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updated_at = Column(DateTime
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, default=datetime.now
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, onupdate=datetime.now
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, server_default=text("CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
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, nullable=False
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,comment="更新时间")
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is_deleted = Column(TINYINT
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,default=0
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,server_default=text("0")
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,nullable=False
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,comment="逻辑删除：0正常，1删除")
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